Magmont Tailings Dam
Key Takeaway
Magmont Tailings Dam is classified as high hazard in Missouri. It was completed in 1979 and is 47 years old. Its primary use is tailings. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 135 ft (taller than 99.7% in MO) |
| Dam Length | 1,190 ft |
| Dam Type | Other |
| Max Storage | 4.6K acre-ft |
| Normal Storage | 3.5K acre-ft |
| Surface Area | 106 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 6,572 cfs |
| Year Completed | 1979 (47 years old) |
| Year Modified | 1998 |
| NID ID | MO30917 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TECK AMERICAN INC
Private
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Low Hazard 34 ftFrequently Asked Questions
What is the hazard classification of Magmont Tailings Dam?
Magmont Tailings Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Magmont Tailings Dam?
Magmont Tailings Dam is owned by TECK AMERICAN INC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Magmont Tailings Dam built?
Magmont Tailings Dam was completed in 1979, making it 47 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Magmont Tailings Dam?
Magmont Tailings Dam serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Magmont Tailings Dam?
Magmont Tailings Dam has a dam height of 135 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Magmont Tailings Dam last inspected?
Magmont Tailings Dam was last inspected on February 16, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.